Affiliation: | Department of Biological Sciences, Northern Arizona University, Flagstaff, AZ 86011,;Environmental Sciences Division, Oak Ridge National Laboratory, Oak Ridge, TN 37831–6422,;Ecology and Evolutionary Biology Department, The University of Tennessee, Knoxville, TN 37996,;Smithsonian Environmental Research Center, PO Box 28, Edgewater, MD 21037, and;School of Forestry, Northern Arizona University, Flagstaff, AZ 86011, USA |